Muscles are fatigued by accumulation of:
A.Myosin ATPase
B.Carbondioxide
C.Lactic acid
D.None of these
Category: Muscle Contraction Physiology Mcqs
Which of these proteins are attached with actin of myofibril:
A.Trponin
B.Tropomyosin
C.Both (a) & (b)
D.None of these
The energy required for muscular contraction is derived from:
A.Action
B.Myosin
C.Actomyosin
D.ATP
Troponin subunit Tpc inhibits actomyosin formation by:
A.Binding with myosin
B.Binding with Ca++ ions
C.Binding with trpomyosin
D.None of these mthods
If a contracting muscle is given a second stimulus during its contraction phase then it is seen to produce ‘M’ curve on kymogram. This phenomenon is termed:
A.Treppe
B.Summation
C.Fatigue
D.None of these
Contraction and relaxation phase of a muscle is called:
A.Twitch
B.Beat
C.Conduction
D.Fatigue
Refractory period in frog’s muscles is about:
A.0.01 seconds
B.0.1 seconds
C.0.3 seconds
D.None of these
Cross bridges are found on:
A.Actin
B.Myosin
C.Troponin
D.Tropomyosin
Besides ATP the other sources of providing energy for muscular contraction are:
A.Breakdown of creatine phosphate
B.Myokinase activity
C.Both (a) & (b)
D.None of these
During recovery phase of muscle contraction the processes occurring are:
A.Breakdown of lactic acid formed during contraction phosphate
B.Resynthesis of creatine phosphate
C.Resynthesis of ATP
D.All of these
